{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","uuid":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","normalized_title":"数字化生存20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","isbns":["9787121307362"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":362,"navigation_url":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104","title_url":"https://workshop.closeclaw.top/ai/title/%E6%95%B0%E5%AD%97%E5%8C%96%E7%94%9F%E5%AD%98%2020%E5%91%A8%E5%B9%B4%E7%BA%AA%E5%BF%B5%E7%89%88","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/bbcce9bd-b637-4fa6-8a80-dadabab80104","page_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/page","search_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/search"},"page":{"printed_page":100,"pdf_page":171,"physical_index":171,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"10a04d74ea3f4d8485738c2cf59094a9b8280f7ce0bf048696e9c1a4bea5faa0"},"chapter":"20周年纪念版 数字化生存 一本影响千百万人的互联网启蒙经典著作","content":"我们可以把一个图形想象成许多行和许多列像素的集合，就好像空白的填字游戏图一样。对于任何一个特定的单色图像（monochromeimage)，你都可以决定要用多少行和多少列来构图。你用的行和列越多，每个方块的面积就越小，图形的颗粒就越精细，效果也就越好。想想看，假如你把这样的格子覆盖在一张照片上，然后给每一个方块依明暗度的不同标出一个数值，那么完成了的填字游戏图将会布满一串串数字。\n\n假如图形是彩色的，每个像素就会带有3个数字，通常这3个数字要么代表红色、绿色和蓝色，要么代表亮度(intensity)、色调(hue)和色彩饱和度（saturation)。我们在小学里都学过，红色、黄色和蓝色，并不是三原色(three primary colors)。加色三原色(three additiveprimaries)，也就是我们在电视机里看到的，是红色、绿色和蓝色；而减色三原色(threesubtractiveprimaries)，也就是我们在彩色印刷品上看到的，是洋红（magenta)、青色(cyan）和黄色。它们都不是红色、黄色和蓝色(据说美国人现在不教小孩这名词，因为洋红magenta这个词拼起来太长了，许多成年人也压根没听说过青色cyan。反正情况就是这样)。\n\n如果画面是运动的，我们就对时间进行取样一一就好像在电影中分出一个个画面一样。每个样本即为一幅画面，也就好比另外一个填字游戏图，如果将其罗列在一起，以足够快的速度连续播放，就会产生运动流畅的视觉效果。你平日很少见到动态图形，或者只能在小小的视窗上显示影像画面，原因之一就是很难快速地从存储器中取得足够数量的比特，然后以像素的形式把它们显示在电脑屏幕上（只有每秒产生60\\~90幅画面，画面上的动作才会流畅，不再闪动不已)。在这方面，每天都不断出现速度更快的新产品或新技术。\n\n100\n\nbeing digital |数字化生存","previous_page":99,"next_page":101}